Telescopic power supply device



FIG. 1 is a front elevation view of a telescopic power supply device showing our new design;

FIG. 2 is a front and left perspective view thereof;

FIG. 3 is a perspective view thereof, shown in a use state;

FIG. 4 is a rear elevation view of that shown in FIG. 1 ;

FIG. 5 is an enlarged top plan view thereof;

FIG. 6 is an enlarged bottom plan view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is a right side elevation view thereof.

The broken lines shown represent the portions of the telescopic power supply device that form no part of the claimed design. 

CLAIM We claim the ornamental design for a telescopic power supply device, as shown and described. 